THe systems IN the E-767 are the same as the E-3C the RADAR is the same AN/APY-2 that is in the E-3C (the 2 has better maritime capes than the APY-1)

The reason Japan got hte 767 airframe was that Boeing would not start up the 707 production line for just 4 airframes. So 767 it became.

actually Generators are a problem on the 767. the E-3 has 4 engines (plus the aux) with 2 generators a piece. While the E-767 is much harder to get internal power from.

The wedgetail is a phased array radar versus pulse, dopler and BTH systems. So the difference is coverage area and MTI-moving target indication is a little different and there is not a doppler notch (so to speak) the same as on a simple doppler system.

also there are fewer consoles and controllers on the wedgetail, so it has less Battle Management capes, and no Electronic Combat.PDS system like hte E-3 (US,NATO, UK).

Cheers. Now to get a replacement for the old E-2 in carrierservice (and for the E-3 over time) started. With current development cycles it'll take 20 years to get them in service by which time the current models will be very old indeed.

a 767 airframe is under development to combine several aspects of the E-3, J-STARS and even Rivet Joint. on a 'super HVAA'

"The MC2A is being designed to replace the RC-135 RJ, E-8 J-STARS, and AWACS aircraft and, as an added benefit, to spot stealthy targets such as cruise missiles. As posted in an early tactics update the first testbed flew Apr 18 at Hanscom AFB, Mass. The plans also allow for the aircraft to carry a forward deployed airborne JAOC to give it combat ops capes for controlling global strike task forces. The testbed a 707 airframe nicknamed ‘Paul Revere’ is to eventually be replaced in the new widebody B-767. See AWST 29 Apr pg 32"

Those of us flying the E-3 don't see this as the best option but time will tell.

the E-767 (which has the same Radar as the E-3) is not the same as what is being developed above. The Wedgetail would have more similar capes to the E-2 Hawkeye 2000.

I agree having a single platform for everything is not good.
Not only will there have to be too many compromises, it will also be a much more inviting target and the budgethawks will say that as it can do the job of 3 types, you need only 1/4 of the total number of those combined fleets.